Comparison of Colorful iGame GeForce GTX 1080 U-TOP-8G-V video card vs ZOTAC GeForce GTX 1080 Ti AMP Edition video card by specifications and benchmarks. Colorful iGame GeForce GTX 1080 U-TOP-8G-V runs at 1.607 GHz base clock speed and has 8 GB of GDDR5X memory, while video card ZOTAC GeForce GTX 1080 Ti AMP Edition runs at 1.569 GHz+ 6 % base clock speed and has 11 GB of GDDR5X memory. The TDP of the first video card is 180 W, and the second is 270 W+ 8 %. Compare the table of benchmark results to find out which graphic card is better.